Piston



June 24, 1930. w, H, SCH LZE 1,766,150

Filed Oct 20. 192'! INVENTOR. U1 lham H- Sch L Ze I I A TTORNE Y.

Patented June I 24,];193o

v J wi -1.24m; H. seHnnznor nri'rnorr, memm Application filed October 20, 1927'. seri m..227;e1e.

It is an object of the present invention to provide a mechanism whereby this result can be obtained and afpistori effected which is re economical of manufacture, durable" in structure,.and highly efiicient in use.

7 7 Another object of the lnventlon is the provision of a novel means for. locking the sepa- V rable head against'rotation relatively to the main body of the piston;

' Another object of the invention is the provision of a novelv and effective 'means of securing the piston rings in position. H

Other objects will appear hereinafter.

. The invention consists in the combination and arrangement of parts hereinafter described and claimed. I

The invention will be best understood by a reference to the accompanying drawings 25 which form a part of this specification and in which y F ig, 1 is a central vertical sectional view of the invention. j v

Fig. 2 is asectionalviewtaken on line 2f-2 of Fig. 1.

In the drawings I have illustrated the pistons comprising. a skirt 7 ,used with which 7 is a detachable head 8'having the peripheral "flange 9 projecting. outwardly from one face thereof, and threaded on its periphery to thread into the upper or reinforced end of 4 the skirt 7 Projecting centrally from one face of the head'8 is a sleevelO. Alflange 11 f will be thr ade de nwe ly 'in e re t o' i wi h h r 2 a JdQ' nges ei -theifl projects outwardly fromthe head 8 and is 40 I a groove 13 formed inthe reinforced or upper part of the skirt 7-, ,"'these groovesfbelng j adapted for the reception of ribs on the'piston rings 14 and 15 whichiarepositioned betweenthe'flange, 11 andthe shoulder 17 'of-the upper portion of; the skirt 7. An oil groove 16 is formed by-beveling therings 1 1 and-15 at their meeting faces.

Formedin the upper or reinforced part of, "the skirt is an opening lS regist'ering with to remove the headS from the ski-rt 7:thescrew screw permitting, the springs 24;- and,. 26 to movethe'p i'ns 22and 2,7 inwar'd'ly'toward each .\Vhenthisidisengagementofthe pinsfromthe" v 85 1 be threaded fromjt-he skirt 7. When iti is oleg v V, sired .tQoreplace the head on theskirt after I U provided'with the groove 12registering with v formedin thelflan ge 9. 7 These i Open n s .1 and l 'e ser i w th th openings 2O' and 21 formed in the flangeland i v in= the upper portion ofthe skirt. respectively. Slidably positioned ain t-he. openings '18; and 19.; isga' pin 22 having thetapier'ed-head 28. formed t er o to eng g on 1 9 $he P Hgt2 e the opposite end engaging "the fiange A 7 pin 27 is slidably mounted in the openings 20' and 21 and provided with the head 25 and the; spring 2,6, thesesprings 24 and 26 servin normally to thrust the pins inwardly-tewar'a. each other; seas to move them out of engage men t withthe}openings,1-8 and 21. Thre d d inthe sleevelQis a screw 28 having a head; 29, 5 i

beneath which is positioned a copper washer 30.--1A peripheralgroove' 31 is formedinthe' screwl28inwhich engages theheads 23 and 25,- th-is engagement of theheads' 25 and23 in the.groove31preventing the movement of the pins. 22 and. 2.7 out of engagement with the end 32 0f thescrew 28 is tapered. 7 I 'When the lparts are inthe form-shown in' ig 1 L un r a s f h h 8 fr m the skirt] is prevented because of the engages ment of the pins 22 and-27 in the openings 1-9 and 18 and the openings 20 and 21. Inorder openingslSarid 2 1}. Asshown in Eignl' thel 281nust be first removed, theremovalof this other, flso "as to jclearrthe openings;18- and 21.).

.the ringsljand 1 5 are. ill pQsitiongthe head '8' Y A thread ng of e r wi 8 n d y; f

willforcegthegpinsto move into the positionp shown-511 .E e 1 sotha e, o k glq thep t lethedrar i ig iheve wn iei k tr I v de wi heip u e ity.of p n 3.5'fwh ch servetolighten the 1' piston and at the same time, afford-a more efficient lubrication. j I

' .Patentis} a 'A p'istonfof I V p 7 i ing: a'skir'tia head threadable onsaid'skirt"; V I WILLIAM means projeotable through said'headand said i j skirt for preventing rotation of said head reltumshown, but desire to avail myself ofsueh variationsand modifications as come within.

the scope of'the appended claims.

Having thns described my invention what I Claim-as new anddesire to secure by Letters the ela ss desorihedi feomprisprevent ng relative rotation of said head and i said skirt; resilient means normally pressing said pins inwardly and eifecting upon ,re-

i a =70 sald heads, radial nward movementvof said pins so as to; disengage from the open ngs 1n moval of said screw from engagement with said skirt. 1-

- #In testimony whereof I have signed thei 1 foregoing specification.

' atively to said skirt; resilientineans for nor- V vmallytending to move said'retaining means d o out of operative positionandradially inwarde 1y of skirt and means for resisting said resiliw ent means.

'2; A pistonof 1 20 i ingtfa skirt;fa'head mounted upon and detaoh ableffrom said skirtj'a radiallymovablethe class desoribed; comprismeansfori'loeking said head and said skirt'in i i inwardly of said skirt and'into inoperative positiongl and a screw forresistingsaid resilie entmeans g V A fli3QA; piston of -theola'ss deseribed compris- V openings aligning "with openings 3 formed in saidskirt; pinsslidably mountedin said openingsfforip'reventingi relativelrotation of said fiiied relation; resilient means forno'rmallyw i p v tending to move said loekingmeans' radially i head-andsaid-skirt; aj'sp'ring mounted on' eaohofsa-id pins; for normally 'rnovi'ngjgfsaid.

pins radiallyinwardlyof said skirt'and out I of engagement' with'the' openings in said "40" v i "said headand normally preventing radial in-" I T Ward movement; 50;"; said pins-toinoperative skirt; and a screw threaded oentrally through 4;. :Apist0nofjtheolass de'scribedcomprising a skirt; detachablehead threaded .on'

'said'ski rt; a; portion ofsaid head projecting 7 inwardly ofsaid'skirt, said inwardly project-' p 'Lingpoiftionzhaving openings formed'therein T 1 in alignment with openingsformedinsaid skirt; a ;centrally disposedinwardly rojeotif f V interiorlyf thraded neckgo'n said ead a v I 1 S'dre'w threaded intoisaid neck and proj eating] 5 l' 'i" V inwardly of aid'skirt said' screw being pro l the a l -vided1with5asperipheral groove intermediate M itsjendsf o"Provide"ahead atits inner endf V "i said'gro'ovebeinginclinedaping V V} .7 si i bly'l ie t d ni fi hj ii Openi gs n i said inwardly "pr'oj ecting 'portiofii-and'j'engagv r '1" ing. in tlije aligning opening in said ski rtfgfonpiiient'ng' rel'afive rotation ofsaidheadand l said skirt a head nountedontheiinner-end a off eacli or "saidpins; said heads .beingfadapt edforIei agement'insaid groove; saidipins durin'g' theengagementffof said h eadsiiniisaid I grooves, projectingintoftheiopenings -in' said' fsoHU ZE, 

